Other
- Marine Evacuation System, lifesaving apparatus fitted to ships
- Mesitylene, a derivative of benzene
- A preposition (més) in the Catalan language meaning 'more'
- Mark E. Smith, musician in The Fall
- The ICAO airline identifier for Mesaba Airlines
- MES or Medium Edison Screw, a type of lightbulb socket commonly used in North America
- Minimum Efficient Scale, an economic concept to denote efficient firm size
- Man, Economy, and State, a book by the economist Murray Rothbard
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